AES E-Library

AES E-Library

Low Complexity Bit Allocation Algorithms for MP3/AAC Encoding

We have developed two reduced complexity bit-allocation
algorithms
for MP3/AAC based audio encoding, which can be useful at low bit-rates. One
algorithm derives optimum bit-allocation using constrained optimization of
weighted noise-to-mask ratio and the second algorithm uses decoupled
iterations for distortion control and rate control, with convergence
criteria. MUSHRA based evaluation indicated that the new algorithm
would be comparable to AAC but requiring only about 1/10 th the
complexity.

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